CN218981919U - Vertical electrostatic dust collector and dust pelletizing system - Google Patents

Abstract

The utility model relates to the technical field of flue gas purification, and particularly discloses a vertical electrostatic dust collection device and a dust collection system. The electrostatic dust collection device comprises a first dust collection structure and a second dust collection structure. The first dust removal structure sets up under the second dust removal structure, first dust removal structure lower part is provided with the entry, second dust removal structure upper portion is provided with the export, after the flue gas of taking impurity gets into first dust removal structure from the entry, discharge from the upper portion of first dust removal structure, because the second dust removal structure sets up directly over first dust removal structure, from first dust removal structure exhaust flue gas rectilinear motion to second dust removal structure this moment, the flue gas can get into second dust removal structure more evenly promptly, the flue gas can get into each part of second dust removal structure evenly this moment, thereby each partial load of second dust removal structure is approximately the same, local overload work's condition can not appear, the second dust removal structure can adsorb the impurity in the flue gas comprehensively. The dust removal system has all the advantages described above.

Description

Vertical electrostatic dust collector and dust pelletizing system

Technical Field

The utility model relates to the technical field of flue gas purification, in particular to a vertical electrostatic dust collection device and a dust collection system.

Background

The tail gas of partial factories contains more dust, oil smoke, filth and other impurities, and cannot be directly discharged into the atmosphere, so that the tail gas needs to be treated, namely, the impurities in the tail gas are adsorbed to ensure that the discharged tail gas is clean. The impurities in the tail gas are usually removed by using two side-by-side electrostatic fields as shown in fig. 8, the tail gas firstly passes through the first-stage electrostatic field, the impurities are primarily adsorbed, and then the tail gas enters the second-stage electrostatic field which is arranged side-by-side, is adsorbed and then is discharged out of the dust removing device. However, as the two-stage electrostatic fields are arranged side by side, the flue gas does not uniformly enter the second-stage electrostatic field after entering the second-stage electrostatic field from the first-stage electrostatic field (namely, partial interval work of the second-stage electrostatic field is unsaturated and partial interval work of the second-stage electrostatic field is supersaturated), and the supersaturated (exceeding the treatment threshold limit) part of the electrostatic field can not clean impurities, so that more impurities exist in the discharged tail gas. And a secondary electric field is powered by a power supply, there is a problem of overall shutdown.

Accordingly, the prior art is still in need of improvement and development.

Disclosure of Invention

The utility model discloses a vertical electrostatic dust collector and a dust collection system, which are used for solving the problem that the electrostatic field is incomplete in impurity adsorption.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

vertical electrostatic precipitator device includes:

the first dust removing structure comprises a first shell and a first electrostatic field, wherein the first electrostatic field is arranged in the first shell, and an inlet is formed in the first shell;

the second dust removing structure comprises a second shell and a second electrostatic field, the second shell is arranged right above the first shell and is in sealing connection with the first shell, the second electrostatic field is arranged in the second shell, and an outlet is formed in the second shell;

the first dust removing structure and the second dust removing structure are independently powered;

the first electrostatic field is communicated with the second electrostatic field, a flue gas flow passage is formed between the first electrostatic field and the second electrostatic field, and the flue gas flow passage is a linear flow passage.

Preferably, the first electrostatic field includes a first anode tube, a first placement frame, and a first cathode needle, the first anode tube is mounted in the first housing, the first placement frame is mounted in the first housing and adjacent to the first anode tube, the first cathode needle is mounted on the placement frame, and the first cathode needle is disposed in the first anode tube.

Preferably, the first placing frames are provided with two placing frames, the two placing frames are respectively located above and below the first electrostatic field, and two ends of the first cathode needle are respectively fixedly connected with the two first placing frames.

Preferably, a flow equalizing plate is arranged between the first casing and the second casing, and the flow equalizing plate is used for enabling the flue gas to uniformly enter the second electrostatic field from the first electrostatic field.

Preferably, the second electrostatic field includes a second anode tube, a second placement frame, and a second cathode needle, the second anode tube is mounted in the second housing, the second placement frame is mounted in the second housing and adjacent to the second anode tube, the second cathode needle is mounted on the second placement frame, and the second cathode needle is disposed in the second anode tube.

Preferably, the second placing frames are provided with two second placing frames, the second placing frames are respectively located above and below the second electrostatic field, and two ends of the second cathode needle are respectively fixedly connected with the two second placing frames.

Preferably, the first anode tube and the second anode tube are both provided with a plurality of first cathode needles, the number of the first cathode needles is matched with the number of the first anode tubes, the number of the second cathode needles is matched with the number of the second anode tubes, the first cathode needles are coaxially arranged with the first anode tubes, and the second cathode needles are coaxially arranged with the second anode tubes.

Preferably, the first cathode needle and the second cathode needle are square tubular cathode needles.

The utility model also discloses a dust removal system which comprises the vertical electrostatic dust removal device.

Compared with the prior art, the utility model has the beneficial effects that:

according to the vertical electrostatic dust collection device provided by the utility model, the first dust collection structure and the second dust collection structure are arranged in the vertical direction, so that smoke flowing out of the first electrostatic field can enter the second electrostatic field along a straight line, and the smoke flow passage formed between the first electrostatic field and the second electrostatic field is arranged to be a straight line flow passage, so that the smoke does not pass through corners in the flowing process, and further the smoke can enter the second dust collection device more uniformly, and all parts in the second electrostatic field can absorb the smoke in a treatment threshold, so that the smoke purification effect is ensured.

Further, by arranging the anode in a tubular shape (first anode tube and second anode tube), impurities in the flue gas can be sufficiently adsorbed. Through with the upper and lower both ends of first negative pole needle all with first rack fixed connection for first negative pole needle can keep stable under the impact of flue gas. By arranging the flow equalizing plate, the flue gas of the first electrostatic field is further enabled to uniformly enter the second electrostatic field. Through with the upper and lower both ends of second negative pole needle with second rack fixed connection for the second negative pole needle can keep stable under the impact of flue gas. By providing a plurality of anode tubes, the impurity adsorption is more complete. The cathode needle and the anode tube are coaxially arranged, so that dust collection of the anode tube is uniform. By arranging the cathode needle into a square tube, the cathode needle is further ensured to be stable under the impact of smoke. By setting the dust collection area of the second anode tube larger than that of the first anode tube, impurities are further absorbed more completely.

The utility model also discloses a dust removing system which comprises the vertical electrostatic dust removing device and has all the advantages of the dust removing device.

Drawings

Fig. 1 is a schematic structural diagram of a vertical electrostatic precipitator according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a first dust removing structure according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a second dust removing structure according to an embodiment of the present utility model;

FIG. 4 is a top view of a first electrostatic field provided by an embodiment of the present utility model;

FIG. 5 is a top view of a second electrostatic field provided by an embodiment of the present utility model;

FIG. 6 is a schematic view of a cathode needle according to an embodiment of the present utility model;

FIG. 7 is a top view of FIG. 6;

fig. 8 is a schematic structural view of two dust removing structures arranged side by side in the prior art.

Description of main reference numerals: 10-first dust removing structure, 11-first casing, 111-inlet, 112-first protrusion, 12-first electrostatic field, 121-first anode tube, 122-first rack, 123-first cathode needle, 1231-spike, 20-second dust removing structure, 21-second casing, 211-outlet, 212-second protrusion, 22-second electrostatic field, 221-second anode tube, 222-second rack, 223-second cathode needle, 30-flow equalizing plate, 40-insulator.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the present utility model, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

The technical scheme of the utility model will be further described with reference to the examples and the accompanying drawings.

Examples

The electrostatic precipitator device is widely applied to the environment that can produce impurity such as oil smoke, dust, flying batting in a plurality of, can set up the two-stage dust removal structure generally and adsorb the impurity, and the first level adsorbs large granule impurity, and the second level adsorbs small granule impurity for impurity clearance efficiency is higher. However, the two-stage dust removing structures are generally arranged side by side, at this time, a corner exists in the connecting pipe between the two-stage dust removing structures, the flue gas of the dust removing structure on the left side enters into the dust removing structure on the right side at the corner, and turbulence is formed when the flue gas impacts the corner, that is, the flue gas cannot uniformly enter into the dust removing structure on the right side, part of the dust removing structure on the right side is in an overload state, and the other part of the dust removing structure on the right side is in a low-load state. At this time, the dust removing structure of overload operation can not completely adsorb impurities, and the dust removing efficiency of the whole device is lower.

Therefore, the utility model provides a vertical electrostatic dust collector, the two dust collecting structures of the dust collector are arranged in parallel, the flue gas flow passage communicating the two dust collecting structures is a linear flow passage, and the flue gas can uniformly enter the downstream dust collecting structure after flowing out from the upper dust collecting structure, so that the downstream dust collecting structure can comprehensively adsorb impurities, and the dust collecting efficiency of the dust collector is improved

Referring to fig. 1, the vertical electrostatic precipitator provided by the present utility model includes a first dust removing structure 10 and a second dust removing structure 20. The first dust removal structure 10 sets up under the second dust removal structure 20, first dust removal structure 10 lower part is provided with entry 111, second dust removal structure 20 upper portion is provided with export 211, get into first dust removal structure 10 from entry 111 after the flue gas of impurity, because second dust removal structure 20 sets up directly over first dust removal structure 10, the flue gas rectilinear motion who gets into second dust removal structure 20 from first dust removal structure 10 at this moment, flue gas can get into second dust removal structure 20 comparatively evenly, flue gas can get into each part of second dust removal structure 20 evenly at this moment, thereby each part load of second dust removal structure 20 is approximately the same, the condition of local overload work can not appear, second dust removal structure 20 can adsorb the impurity in the flue gas comparatively comprehensively.

Referring to fig. 2-3, the first dust removing structure 10 includes a first housing 11 and a first electrostatic field 12, the first electrostatic field 12 is installed in the first housing 11, and an inlet 111 is provided on the first housing 11. The second dust removing structure 20 includes a second housing 21 and a second electrostatic field 22, the second electrostatic field 22 is installed in the second housing 21, and an outlet 211 is provided on the second housing 21.

Referring to fig. 1, the second housing 21 is disposed directly above the first housing 11, such that a clear flue gas flow path is formed between the first electrostatic field 12 and the second electrostatic field 22, and the flue gas flow path is a linear flow path. When the flue gas flows out from the upper part of the first electrostatic field 12, the flue gas continues to move along the linear flue gas flow channel, the flow of the flue gas in the flue gas flow channel is not interfered, the flue gas is uniformly distributed at the moment, namely, the flue gas can uniformly enter the second electrostatic field 22, all parts of the second electrostatic field 22 uniformly divide the entering flue gas, the occurrence of local overload is avoided, and the second electrostatic field 22 can realize a better adsorption effect at the moment.

The first dust removing structure 10 and the second dust removing structure 20 are powered independently, when one of the first dust removing structure 10 or the second dust removing structure 20 fails, the other power supplying device which does not fail continues to supply power, and at this time, the first dust removing structure 10 or the second dust removing structure 20 can continue to work, so that the dust removing device can still work normally under the condition of failure.

Meanwhile, when the dust removing device is required to be maintained, the other power supply device can be maintained under the condition that the one power supply device works normally, and the work of the dust removing device is not required to be stopped and interrupted.

Specifically, in order to avoid leakage of smoke at the junction of the first housing 11 and the second housing 21, the first housing 11 and the second housing 21 are hermetically connected.

Preferably, in an embodiment of the present utility model, the first housing 11 and the second housing 21 are flange-connected.

Referring to fig. 2 and 4, the first electrostatic field 12 includes a first anode tube 121, a first rack 122, and a first cathode needle 123. The first anode tube 121 is mounted in the first housing 11, the first placement frame 122 is mounted in the first housing 11 adjacent to the first anode tube 121, the first cathode needle 123 is mounted on a placement frame, and the first cathode needle 123 is disposed in the first anode tube 121. When the first cathode needle 123 is energized, the first cathode needle 123 discharges to the first anode tube 121, and impurities in the flue gas flowing through the first anode tube 121 are adsorbed.

In order to increase the adsorption area (dust collection area) of the anode tubes, a plurality of first anode tubes 121 are usually provided, and each first anode tube 121 has a corresponding first cathode needle, so that impurities in the flue gas can be adsorbed better.

The first placing frame 122 and the first cathode needle 123 are both made of metal, and the first placing frame 122 is also of a charged structure. In this case, in order to prevent the first placing frame 122 from directly contacting the first housing 11, an insulator 40 is generally provided between the first placing frame 122 and the first housing 11. As can be seen from comparing the positions of the insulators 40 in fig. 2 and 4, the two sides of the first housing 11 are provided with the first protrusions 112, the insulators 40 corresponding to the first placing frames 122 are respectively and fixedly connected to the first protrusions 112, the two ends of the first placing frames 122 are elongated rods, the two elongated rods respectively extend out of the first housing 11 and are fixedly connected to the upper portion of the insulators 40, and the insulators 40 can obviously increase the creepage distance of high-voltage electricity, so that the first electrostatic field 12 cannot leak to the first housing 11.

In order to enable the first cathode needle 123 to be better fixed, the first placing frames 122 are generally provided with two first placing frames 122 disposed above and below the first electrostatic field 12, respectively, and at this time, the upper end and the lower end of the first cathode needle 123 are fixedly connected with the first placing frame 122 above and the first placing frame 122 below, respectively. After both ends of the first cathode needle 123 are fixedly connected with the first placing frame 122, the first cathode needle 123 can keep a relatively stable posture under the impact of smoke, and then the first electrostatic field 12 can be ensured to be normally discharged, and the adsorption effect of impurities is ensured.

A first protrusion 112 is provided in correspondence with the first placing frame 122 under the first electrostatic field 12, the first protrusion 112 corresponding to the position of the first placing frame 122, and the first protrusion 112 is provided in the lower portion of the first housing 11. Referring to fig. 2, the top of the insulator 40 is fixedly connected to the first protrusion 112, and the bottom of the insulator 40 is fixedly connected to a portion of the first housing 122 extending out of the first housing 11. By arranging the insulator 40 at the joint of the first placing frame 122 and the first housing 11, high-voltage electricity communicated with the first placing frame 122 can be prevented from leaking to the first housing 11, and safety in use is ensured.

Preferably, in an embodiment of the present utility model, the first cathode needle 123 is disposed at the axial position of the first anode tube 121, so that the electric field in the first anode tube 121 is uniform, and a better adsorption effect is achieved.

Referring to fig. 3 and 5, the second electrostatic field 22 includes a second anode tube 221, a second rack 222, and a second cathode needle 223. The second anode tube 221 is installed in the second casing 21, the second placement frame 222 is installed in the second casing 21 adjacent to the second anode tube 221, the second cathode needle 223 is installed on the second placement frame, and the second cathode needle 223 is disposed in the second anode tube 221. When the second cathode needle 223 is energized, the second cathode needle 223 discharges to the second anode tube 221, and impurities in the flue gas flowing through the second anode tube 221 are adsorbed.

In order to increase the adsorption area (dust collection area) of the anode tubes, a plurality of second anode tubes 221 are usually provided, and each second anode tube 221 has a corresponding second cathode needle, so that impurities in the flue gas can be adsorbed better.

The second placing frame 222 and the second cathode needle 223 are both made of metal, and the second placing frame 222 is also of a charged structure. At this time, in order to prevent the second placing frame 222 from directly contacting the second housing 21, an insulator 40 is generally provided between the second placing frame 222 and the second housing 21. As can be seen from comparing the positions of the insulators 40 in fig. 2 and 4, the two sides of the second housing 21 are provided with the second protrusions 212, the insulators 40 corresponding to the second placement frames 222 are respectively and fixedly connected to the second protrusions 212, the two ends of the second placement frames 222 are elongated rods, the two elongated rods respectively extend out of the second housing 21 and are fixedly connected to the upper portion of the insulators 40, and the insulators 40 can obviously increase the creepage distance of high-voltage electricity, so that the second electrostatic field 22 cannot leak to the second housing 21.

In order to enable the second cathode needle 223 to be better fixed, two second holders 222 are generally provided, and two second holders 222 are respectively disposed above and below the second electrostatic field 22, and then the upper and lower ends of the second cathode needle 223 are fixedly connected to the upper second holder 222 and the lower second holder 222, respectively. After both ends of the second cathode needle 223 are fixedly connected with the second placing frame 222, the second cathode needle 223 can keep a relatively stable posture under the impact of smoke, and then the second electrostatic field 22 can be ensured to discharge normally, and the adsorption effect of impurities is ensured.

A second protrusion 212 is provided corresponding to the second placing frame 222 under the second electrostatic field 22, the second protrusion 212 corresponds to the position of the second placing frame 222, and the second protrusion 212 is provided at the lower portion of the second housing 21. Referring to fig. 3, the top of the insulator 40 is fixedly connected to the second protrusion 212, and the bottom of the insulator 40 is fixedly connected to a portion of the second housing 21 where the second rack 222 extends. By providing the insulator 40 at the junction of the second placing frame 222 and the second casing 21, it is possible to ensure that high-voltage electricity communicated with the second placing frame 222 does not leak to the second casing 21, and to ensure safety in use.

Preferably, in an embodiment of the present utility model, the second cathode needle 223 is disposed at the axial position of the second anode tube 221, so that the electric field in the second anode tube 221 is uniform, and a better adsorption effect is achieved.

Further, in order to make the impurity adsorption effect better, the adsorption area (dust collection area) of the second anode tube 221 above the first anode tube 121 is larger than that of the first anode tube 121, so that the flue gas can be more comprehensively adsorbed before being discharged from the outlet 211.

As can be seen from fig. 4 and 5, when the first casing 11 and the second casing 21 are the same or close to each other, the pipe diameter of the second anode pipe 221 is smaller than that of the first anode pipe 121, and the number of the second anode pipes 221 is far greater than that of the first anode pipe 121.

Since the first housing 11 and the second housing 21 are the same size or close together, the outlet 211 of the first anode tube 121 and the inlet 111 of the second anode tube 221 substantially correspond. But when the number of the first anode tubes 121 is smaller than the number of the second anode tubes 221, the first anode tubes 121 and the second anode tubes 221 do not completely correspond.

Further, in an embodiment of the present utility model, a flow equalizing plate 30 may be further disposed at a connection position of the first casing 11 and the second casing 21, and before the flue gas flows out from the first anode tube 121 and enters into the second anode tube 221, the flue gas corresponds to a position of the inlet 111 of the second anode tube 221 under the action of the flow guiding plate, and on the basis of vertically disposing the first casing 11 and the second casing 21 to enhance a flow equalizing effect of the flue gas, the flue gas can more uniformly enter into the second anode tube 221, so that an adsorption effect of impurities in the flue gas is better.

Also, as shown in fig. 1, in order to facilitate the communication between the first housing 11 and the exhaust duct of the flue gas, an inlet 111 on the first housing 11 is provided on a side wall of the first housing 11. The flue gas enters the first housing 11 at the inlet 111 and also passes through a corner. In order to enable the flue gas to enter the first electrostatic field 12 more uniformly, a flow equalizing structure can be arranged between the inlet 111 and the first electrostatic field 12 in the same way, so that the adsorption efficiency of the first electrostatic field 12 to impurities is improved.

When the lengths of the first and second cathode needles 123 and 223 are short, the first and second cathode needles 123 and 223 may be selected from conventional thin cylindrical cathode needles to discharge.

As the first anode tube 121 and the second anode tube 221 are grown, the first cathode needle 123 and the second cathode needle 223 need to follow the growth, and when the length of the first cathode needle 123 and the second cathode needle 223 is about 1 meter or exceeds 1 meter, the first cathode needle 123 or the second cathode needle 223 will shake under the impact of the smoke, and the shake of the cathode needles will affect the normal discharge of the electrostatic field.

Referring to fig. 6 and 7, it is preferable that the present utility model selects a square tube-shaped cathode needle which can be hollow square tube, and the square tube is thicker than a thin cylindrical cathode needle, so that the first and second cathode needles 123 and 223 can be maintained stable under the impact of smoke, and the normal discharge of the first and second electrostatic fields 12 and 22 is ensured. The square tube is hollow, and has lighter weight.

Further, the four side edges of the square-tube-shaped cathode needle are punched with the spines 1231, the spines 1231 are arranged, and after the spines 1231 are arranged on the cathode needle, the cathode needle performs tip discharge through the spines 1231, so that the discharge is simpler. On the basis that the spines 1231 are provided with a plurality of spines, the discharging current is larger, and at a certain power, the operating voltage of the equipment is lower, so that the equipment is more stable.

Preferably, a protective cover may be disposed at the connection between the insulator 40 and the first or second placing frame 122 or 222, so as to further ensure the safety of workers during the electrostatic field discharging process.

The utility model also discloses a dust removal system which comprises the vertical electrostatic dust removal device and has all the advantages of the electrostatic dust removal device.

It will be understood that equivalents and modifications will occur to those skilled in the art based on the present utility model and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present utility model.

Claims (9)

1. Vertical electrostatic precipitator device, its characterized in that includes:

the first dust removing structure comprises a first shell and a first electrostatic field, wherein the first electrostatic field is arranged in the first shell, and an inlet is formed in the first shell;

the second dust removing structure comprises a second shell and a second electrostatic field, the second shell is arranged right above the first shell and is in sealing connection with the first shell, the second electrostatic field is arranged in the second shell, and an outlet is formed in the second shell;

the first dust removing structure and the second dust removing structure are independently powered;

the first electrostatic field is communicated with the second electrostatic field, a flue gas flow passage is formed between the first electrostatic field and the second electrostatic field, and the flue gas flow passage is a linear flow passage.

2. The vertical electrostatic precipitator device of claim 1, wherein the first electrostatic field comprises a first anode tube mounted in the first housing, a first rack mounted in the first housing adjacent to the first anode tube, and a first cathode needle mounted on the first rack, the first cathode needle disposed in the first anode tube.

3. The vertical electrostatic precipitator device according to claim 2, wherein two first holders are disposed above and below the first electrostatic field, and two ends of the first cathode needle are fixedly connected to the two first holders, respectively.

4. The vertical electrostatic precipitator device according to claim 2, wherein a flow equalization plate is disposed between the first casing and the second casing, the flow equalization plate being configured to uniformly pass flue gas from the first electrostatic field into the second electrostatic field.

5. The vertical electrostatic precipitator device of claim 4, wherein said second electrostatic field comprises a second anode tube mounted in said second casing, a second rack mounted in said second casing adjacent to said second anode tube, and a second cathode needle mounted on said second rack, said second cathode needle disposed in said second anode tube.

6. The vertical electrostatic precipitator device according to claim 5, wherein two second holders are disposed above and below the second electrostatic field, and two ends of the second cathode needle are fixedly connected to the two second holders, respectively.

7. The vertical electrostatic precipitator device according to claim 5, wherein said first anode tube and said second anode tube are each provided in plural numbers, said first cathode needles are in a number matching with said first anode tube, said second cathode needles are in a number matching with said second anode tube, said first cathode needles are disposed coaxially with said first anode tube, and said second cathode needles are disposed coaxially with said second anode tube.

8. The vertical electrostatic precipitator device of claim 7, wherein the first cathode needle and the second cathode needle are square tube shaped cathode needles.

9. A dust removal system comprising a vertical electrostatic precipitator device according to any one of claims 1-8.

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